3 years ago

Which expression represents the algebraic phrase “eleven less than seven times a number”?

Mathematics

1 answer:

STatiana [176]3 years ago

6 0

11-7x because eleven less than is 11- and seven times a number is 7x

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A triangle has side lengths 8, 11, and 13. Is it a right triangle?

amid [387]

Answer:

It is not a right triangle. It is an obtuse triangle.

Step-by-step explanation:

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3 years ago

Person A can make a cupcake in 5 minutes, Person B can make a cupcake in 9 minutes. In total they made 168 cupcakes. How many cu

Stolb23 [73]

Answer:

Person A made 108 cupcakes and person B made 60 cupcakes.

Step-by-step explanation:

Person A makes 1 cupcake in 5 minutes.

Say in x minutes A makes : $\frac{x}{5}$ cupcakes

Person B makes 1 cupcake in 9 minutes.

Say in x minutes B makes : $\frac{x}{9}$ cupcakes

Total cupcakes prepared by A and B in x minutes = 168

$\frac{x}{5}+\frac{x}{9}=168$

$\frac{14x}{45}=168$

$x=\frac{168\times 45}{14}=540$

So, cupcakes made by A = $\frac{540}{5}=108$

Cupcakes made by B = $\frac{540}{9}=60$

Person A made 108 cupcakes and person B made 60 cupcakes.

5 0

4 years ago

What are the steps for x2-11=-2

Rama09 [41]

Answer:

x=3

Step-by-step explanation:

x^2=9

x=3

8 0

3 years ago

Read 2 more answers

Which expression is equivalent to √2/ 3√2 ?

NikAS [45]

You can factor out the square root of two from the num and denom of this fraction leaving you with 1/3 or 1.33

3 0

3 years ago

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A ladder is leaning against the side of a building and positioned such that the base of the ladder is 17 ft from the base of the

andrezito [222]

Answer:

The ladder is 28.6 feet long.

Step-by-step explanation:

Given that:

Length of base = 17 feet

Length above the ground = 23 feet

These forms two legs of right angled triangle.

The length of ladder will be the hypotenuse.

Using Pythagorean theorem;

$a^2+b^2=c^2\\(17)^2 + (23)^2 = c^2 \\289 + 529 = c^2 \\c^2 = 818$

Taking square root on both sides

$\sqrt{c^2}=\sqrt{818}\\c=28.6$

Hence,

The ladder is 28.6 feet long.

5 0

3 years ago